DA
Donald Adams — 1940 US Census Record
Model Tree available1940 United States Federal Census · Rock-Island-County, Illinois
Our Model Tree links this Donald Adams across the 1920, 1930 and 1940 US Censuses in Rock-Island-County, Illinois (XGBoost, ~Confirmed), with identified parents Roy & Roy — first a son (b.~1911), then head of a 4-person household.
Age 29
b. ~1911
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Rock-Island-County, Illinois |
| Surname | Adams |
| Given Name | Donald H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Moline |
| 1935 Residence (County) | Rock Island |
| Additional Details | |
| Occupation | Draftsman |
| Industry | Implement Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1560 |
| Highest Grade | H-2 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Draftsman |
| Township / Ward | Moline |
| Est. Birth Year | ~1911 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Donald | Age | Birth yr |
|---|---|---|---|---|
| Donald Adams | Son | — | 29 | ~1911 |
| Roy Adams | Head | — | 59 | ~1881 |
| Ethel Adams | Spouse | — | 55 | ~1885 |
| Helen Adams | Spouse | — | 28 | ~1912 |
Census Appearances
1920
Rock Island, …
Son, age 8
Rock Island, Illinois · implied b. ~1912 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Adams |
| Given Name | Donald |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Rock Island, …
Son, age 18
Rock Island, Illinois · implied b. ~1912 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Adams |
| Given Name | Donald |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Rock-Island-County, Illinois
Son, age 29
Rock-Island-County, Illinois · implied b. ~1911 — 4 household members
| Surname | Adams |
| Given Name | Donald H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Moline |
| 1935 Residence (County) | Rock Island |
| Occupation | Draftsman |
| Industry | Implement Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1560 |
| Highest Grade | H-2 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links Donald Adams across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Roy Adams (~0.92 confidence) and father Roy Adams (~0.92 confidence) and mother Ethel Adams (~0.92 confidence) and mother Ethel Adams (~0.92 confidence) and mother Helen Adams (~0.50 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.84
Father
Roy Adams
b. ~1881
Source father
● Household
· direct · ~0.92
Father
Roy Adams
b. ~1881
Source father
● Household
· direct · ~0.92
Mother
Ethel Adams
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Ethel Adams
b. ~1885
Source mother
● Household
· direct · ~0.92
Mother
Helen Adams
b. ~1912
Source mother
● Household
· direct · ~0.5
This person
Anchor record
Donald Adams
Son · 1940 · age 29 · b. ~1911 · Illinois
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Rock-Island-County, Illinois
Open full size
1940 US Federal Census — Rock-Island-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00875-00772)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Roy W. Adams | 59 | Head | Contractor | Illinois |
| 42 | Ethel R. Adams | 55 | Wife | — | Illinois |
| 43 | Donald H. Adams THIS PERSON | 29 | Son | Draftsman | Illinois |
| 44 | Helen Adams | 28 | Wife | Registered Nurse | Illinois |
| 45 | William J. Frank | 39 | Head | Laborer | Indiana |
| 46 | Mary X. Frank | 34 | Wife | — | Indiana |
| 47 | Mary Joan Frank | 13 | Daughter | — | Illinois |
| 48 | Carol R. Frank | 5 | Daughter | — | Illinois |
| 49 | John R. Frank | 30 | Head | Moulder Helper | Indiana |
| 50 | Bessie Frank | 27 | Wife | — | Illinois |
| 51 | Betty M. Frank | 9 | Daughter | — | Illinois |
| 52 | John R. Jr. Frank | 5 | Son | — | Oregon |
| 53 | Violet J. Frank | 1 | Daughter | — | Illinois |
| 54 | Clifford Clisand | 27 | Head | Truck-Driver | Illinois |
| 55 | Esther Clisand | 28 | Wife | — | Minnesota |
| 56 | Boyd Clisand | 7 | Son | — | Iowa |
| 57 | Barbara Clisand | 5 | Daughter | — | Iowa |
| 58 | Gary Clisand | 3 | Son | — | Illinois |
| 59 | Robert Hartman | 29 | Head | Laundry Man | Illinois |
| 60 | Carol Hartman | 26 | Wife | — | Illinois |
| 61 | Sally Rae Hartman | 5 | Daughter | — | Illinois |
| 62 | William Jr. Raeth | 26 | Head | Office Maintenance Man | Illinois |
| 63 | Leola Raeth | 30 | Wife | — | Minnesota |
| 64 | William Raeth | 1 | Son | — | Illinois |
| 65 | Axel F. Swenson | 54 | Head | Painter | Sweden |
| 66 | Ellen Swenson | 49 | Wife | — | Sweden |
| 67 | Elsie Swenson | 17 | Daughter | Housework | Illinois |
| 68 | Anna Swenson | 15 | Daughter | Child Nurse | Illinois |
| 69 | Helen Swenson | 12 | Daughter | — | Illinois |
| 70 | Eleanor Swenson | 10 | Daughter | — | Illinois |
| 71 | Hildur Swenson | 8 | Daughter | — | Illinois |
| 72 | Carl H. Olson | 42 | Head | Foreman Woodworker | Illinois |
| 73 | Viven Olson | 41 | Wife | — | Illinois |
| 74 | Carl Jr. Olson | 15 | Son | — | Illinois |
| 75 | Gracie Olson | 13 | Daughter | — | Illinois |
| 76 | Robert E. Kevina | 27 | Head | Painter | Belgium |
| 77 | Blanche Kevina | 16 | Wife | — | Illinois |
| 78 | Camiel C. Kevina | 58 | Head | Painter | Belgium |
| 79 | Helen Kevina | 51 | Wife | — | Belgium |
| 80 | Robert Kevina | 6 | Son | — | Illinois |
Pedigree Summary
Donald
Gen 1 · 5 parents
~0.84
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)